Historical
DIN EN 10305-4:2003
Steel tubes for precision applications - Technical delivery conditions - Part 4: Seamless cold drawn tubes for hydraulic and pneumatic power systems (Foreign Standard)
The document specifies the technical delivery conditions for seamless cold drawn steel tubes of circular cross section used in hydraulic and pneumatic power systems, manufactured from steels given in table 1. Tubes according to this document are characterized by having precisely defined tolerances on dimensions and a specified surface roughness.
Deutsches Institut für Normung [din]